如何递归地观察 Rust 中的文件更改？

Question

题：。如何在 Rust 中观察文件/目录的变化？额外：如何以非阻塞方式集成它。规范示例（例如由https://docs.rs/notify/4.0.15/notify/提供的示例）显示了如何查看文件，但它会阻止主函数执行的其余部分。（我正在追求这个https://doc.rust-lang.org/std/sync/mpsc/fn.channel.html）

Answer 1

notify板条箱的示例代码可以满足您的需求。它用于RecursiveMode::Recursive指定监视所提供路径中的所有文件和子目录。

use notify::{Watcher, RecursiveMode, watcher};
use std::sync::mpsc::channel;
use std::time::Duration;

fn main() {
    // Create a channel to receive the events.
    let (sender, receiver) = channel();

    // Create a watcher object, delivering debounced events.
    // The notification back-end is selected based on the platform.
    let mut watcher = watcher(sender, Duration::from_secs(10)).unwrap();

    // Add a path to be watched. All files and directories at that path and
    // below will be monitored for changes.
    watcher.watch("/path/to/watch", RecursiveMode::Recursive).unwrap();

    loop {
        match receiver.recv() {
           Ok(event) => println!("{:?}", event),
           Err(e) => println!("watch error: {:?}", e),
        }
    }
}